Adjustable spacer bar



Feb. 15, 1949. R. J. Mo' rHs 2,461,996

ADJ UST-ABLE SPACER BAR Filed April 3, 1946 2 Sheets-Sheet 1 On It I j I I Feb. 15, 1949. R. J. MOTHS ADJUSTABLE SPACER BAR 2 sheets sheet 2 Filed April 5, 1946 Patented Feb. 15, 1949 UNITED STATES ATENT OFFICEv ADJUSTABLE SPACER BAR Raymond J. Moths, Fox Point, Wis.

Application April 3, 1946, Serial No. 659,353

3 Claims.

This invention relates to an adjustable spacer bar and more particularly to an adjustable spacer bar adapted to regulate the spacing between the sides of a form for a concrete wall.

One object of the present invention is to provide an adjustable spacer bar which may be readily altered to vary the spacing between the side forms of a concrete wall or the like.

Another object is to provide an adjustable spacer bar which will not become clogged or fouled with concrete.

A further object is to provide an adjustable spacer which will be simple to use.

A still further object is to provide an adjustable spacer bar in which the spacing pins are maintained parallel.

Other objects will become apparent upon considering the following specification which, when taken in conjunction with the accompanying drawings, illustrate a preferred form of the invention.

In the drawings:

Fig. 1 is a cross-section through a wall during the process of pouring showing the form supporting trusses being held in place by the adjustable spacer bar forming the subject matter of the present invention;

Fig. 2 is a top view of the adjustable spacer bar shown in Fig. 1;

Fig. 3 is an enlarged cross-sectional view of the top part of the form shown in Fig. 1 and showing the details of the adjustable spacer bar;

Fig. 4 is a cross-section taken on the line 4-4 of Fig. 3, looking ln'the direction of the arrows;

Fig. 5 is an end view of the nut end of the spacer bar, showing the upper end of a truss; and

Fig. 6 is a cross-section taken on the line 6-6 of Fig. 3, looking in the direction of the arrows.

Referring to the drawings, the concrete wall I is built on a base II which has a U-shaped stirrup l2 imbedded therein. The U-shaped stirrup has parallel ends projecting from the concrete base, which are spaced at suitable distances to receive the tubular ends of trusses [4-44 and give the required thickness of Wall 10. The trusses l4l4 have clips l (best seen in Fig. 4) formed thereon which receive 2 x 4s, numbered It, to which may be nailed plywood sheathing 18 comprising the sides of the wall form.

The upper ends of the trusses are held in adjusted spaced relationship by an adjustable spacer bar, generally designated 20, which is shown in detail in Figs. 2, 3, 5 and 6. Referring 2 to Figs. 2 and 3, the spacer comprises a screw 24, having left hand threads cut on one end, and right hand threads 26 cut on the opposite end. A square head 28 is formed on one end of the screw to facilitate turning thereof.

A pair of nuts 30 and 3| are mounted on the threads 25 and 26, respectively, and are moved towards and away from each other by turning the screw 2 i. The nuts 30 and 3| have cylindrical shanks 33 and 34 formed on the sides of the nuts 38 and 3!, respectively, which shanks are adapted to fit snugly in the upper tubular ends of the trusses 14-44.

A shield 38 fits over the top of the nuts 39 and BI and extends downwardly with parallel sides so as to protect both the top and the sides of the screw 24 and the nuts 30 and SI from concrete during the pouring of the wall. The shield 38 is fixed to the nut 30 by means of a plurality of screws Ml which secure the shield rigidly in place on the nut. The opposite end of the shield is secured to the nut Si by screws ll which operate in slots 33, the slots permitting the movement of the nut 3! relative to the nut 30.

It will thus be seen that there has been provided a relatively simple spacer bar which may be adjusted in length and which will be protected adequately against the possibility of becoming clogged or fouled with concrete, and which will hold the sides of the wall form at a desired spac- It will be realized that the hereinbefore described form of the invention is to be taken merely as a preferred embodiment thereof and that various changes in size, shape and arrangement of parts may be made without departing from the spirit of the invention or the scope of the subjoined claims.

That which is claimed as new and is desired to be secured by Letters Patent is:

1. In an adjustable spacer bar of the character described, a screw having right hand and left hand threads thereon, a nut on one end of said screw having a projection thereon adapted to engage with a part of a concrete form, a nut on the opposite end of said screw having a projection thereon adapted to engage another part of the concrete form, a shield joining said nuts, means to secure the shield to one of said nuts, and means to secure the shield in sliding engagement to the opposite nut to permit longitudinal movement of said nuts on said screw.

2. An adjustable spacer bar of the character described comprising a screw having a right hand thread thereon, a left hand thread on the oppo- 3 site end thereof, a nut on one end of said screw, a projection on said nut engageable with a portion of the concrete form, a nut on the opposite end of said screw, a projection on said nut engageable with another portion of said concrete form, a shield over said screw and said nuts, and means to secure said shield to the nuts to permit limited movement of said nuts on said screw.

3. An adjustable spacer bar for use on a concrete form or the like comprising a screw having a right hand thread on one end thereof, a left hand thread on the opposite end thereof and a polygonal end on said screw to facilitate turning, a first nut mounted on one end of saidsscrew, a projection on said nut engageable with a portion of the concrete form, a second nut mounted on the opposite end of said screw, a projection 4 on said second nut engageable with a portion of the concrete form, a shield having an elongated slot therein, means to secure said shield in place over said screw and nuts at one end thereof, and a screw operating in said slot and secured to one of said nuts to permit limited movement of said nuts on said first named. screw.

RAY J. MOTHS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 15 Number Name Date *1;301,959 Merrick Apr. 29, 1919 2,288,365 Moths June 30, 1942 

